RECON: TNO occultation with 78799

Event between (78799) 02XW93 and star UC4-619-030673 with event index number of 172004

Geocentric closest approach at 2018/12/09 06:16:51 UTC

J2000 position of star is 06:06:51.2 +33:46:58
Equinox of date position of star is 06:08:01.0 +33:46:47
Stellar brightness R=15.8, use SENSEUP=128
Star is 166 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 45.7 AU from the Sun and 44.7 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 1154 seconds.
The 1-sigma cross-track error in the shadow position is 5398 km.
The sky-plane scale is 32445.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 18.7 sec chord
Diameter=195.4 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 78799, (2018/12/09 06:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.4 +27:58:44  1.1 21.83 164
Alnath         05:27:29.4 +28:37:18  1.6 10.09 162
PPM 071196     06:06:49.0 +33:35:46  6.1  0.32 166
PPM 071191     06:06:39.1 +33:43:52  8.5  0.31 166
PPM 071226     06:07:56.5 +33:48:40 10.7  0.05 166
78799          06:08:06.3 +33:46:46 15.8       166
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 0.8 sigma about the mid-time.
The median site spacing is 24.0 km RECON observability=1.0 and success probability=6.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:18:42 -58.3 Dark Down 57.8 103.6 Up 06:03:42 - 06:33:42 7619
Tonasket 06:18:42 -58.4 Dark Down 57.9 103.2 Up 06:03:42 - 06:33:42 7595
Okanogan 06:18:43 -58.6 Dark Down 57.9 102.5 Up 06:03:43 - 06:33:43 7564
Brewster 06:18:43 -58.7 Dark Down 57.8 101.9 Up 06:03:43 - 06:33:43 7541
Manson/Chelan 06:18:45 -58.7 Dark Down 57.6 101.3 Up 06:03:45 - 06:33:45 7527
Entiat 06:18:45 -58.8 Dark Down 57.6 100.9 Up 06:03:45 - 06:33:45 7506
Wenatchee 06:18:46 -58.9 Dark Down 57.6 100.4 Up 06:03:46 - 06:33:46 7482
Ellensburg 06:18:48 -59.1 Dark Down 57.5 99.5 Up 06:03:48 - 06:33:48 7444
Yakima 06:18:48 -59.4 Dark Down 57.5 98.9 Up 06:03:48 - 06:33:48 7403
Toppenish/White Swan 06:18:48 -59.6 Dark Down 57.7 98.7 Up 06:03:48 - 06:33:48 7377
Pasco 06:18:45 -60.3 Dark Down 58.6 99.6 Up 06:03:45 - 06:33:45 7338
Goldendale 06:18:50 -59.8 Dark Down 57.5 97.5 Up 06:03:50 - 06:33:50 7329
The Dalles 06:18:51 -59.7 Dark Down 57.3 96.8 Up 06:03:51 - 06:33:51 7314
George/Umatilla 06:18:46 -60.5 Dark Down 58.5 98.9 Up 06:03:46 - 06:33:46 7308
PNWRO 06:18:45 -60.6 Dark Down 58.8 99.5 Up 06:03:45 - 06:33:45 7308
Maupin 06:18:52 -60.1 Dark Down 57.4 96.3 Up 06:03:52 - 06:33:52 7269
Madras/Culver 06:18:53 -60.4 Dark Down 57.4 95.4 Up 06:03:53 - 06:33:53 7213
Sisters 06:18:54 -60.4 Dark Down 57.1 94.5 Up 06:03:54 - 06:33:54 7189
Redmond 06:18:53 -60.6 Dark Down 57.4 94.8 Up 06:03:53 - 06:33:53 7178
Bend 06:18:54 -60.7 Dark Down 57.3 94.3 Up 06:03:54 - 06:33:54 7159
Oregon Observatory 06:18:55 -60.7 Dark Down 57.3 94.0 Up 06:03:55 - 06:33:55 7144
La Pine/Gilchrist 06:18:55 -60.8 Dark Down 57.2 93.6 Up 06:03:55 - 06:33:55 7124
North Lake 06:18:54 -61.4 Dark Down 57.7 93.4 Up 06:03:54 - 06:33:54 7065
Chiloquin 06:18:57 -61.2 Dark Down 57.0 91.6 Up 06:03:57 - 06:33:57 7017
Paisley 06:18:54 -61.9 Dark Down 58.0 92.8 Up 06:03:54 - 06:33:54 6999
Klamath Falls 06:18:58 -61.5 Dark Down 57.1 91.2 Up 06:03:58 - 06:33:58 6979
Tulelake 06:18:58 -61.8 Dark Down 57.3 91.0 Up 06:03:58 - 06:33:58 6944
Lakeview 06:18:55 -62.4 Dark Down 58.1 92.1 Up 06:03:55 - 06:33:55 6942
Cedarville 06:18:55 -62.9 Dark Down 58.3 91.2 Up 06:03:55 - 06:33:55 6869
Fall River/Burney 06:18:59 -62.4 Dark Down 57.4 89.6 Up 06:03:59 - 06:33:59 6847
Susanville 06:18:58 -63.2 Dark Down 57.9 89.1 Up 06:03:58 - 06:33:58 6763
Greenville 06:19:00 -63.2 Dark Down 57.7 88.5 Up 06:04:00 - 06:34:00 6742
Gimple 06:18:59 -63.2 Dark Down 57.8 88.5 Up 06:03:59 - 06:33:59 6739
Quincy 06:18:59 -63.3 Dark Down 57.7 88.1 Up 06:03:59 - 06:33:59 6720
Portola 06:18:59 -63.7 Dark Down 58.1 88.2 Up 06:03:59 - 06:33:59 6696
Reno 06:18:57 -64.2 Dark Down 58.6 88.2 Up 06:03:57 - 06:33:57 6652
Carson City 06:18:58 -64.4 Dark Down 58.6 87.6 Up 06:03:58 - 06:33:58 6614
Gardnerville 06:18:58 -64.6 Dark Down 58.6 87.2 Up 06:03:58 - 06:33:58 6587
Yerington 06:18:56 -65.0 Dark Down 59.0 87.6 Up 06:03:56 - 06:33:56 6578
Hawthorne 06:18:55 -65.6 Dark Down 59.4 87.2 Up 06:03:55 - 06:33:55 6517
Lee Vining 06:18:57 -65.5 Dark Down 59.0 86.0 Up 06:03:57 - 06:33:57 6468
Niwot 06:18:14 -71.2 Dark Down 69.6 100.3 Up 06:03:14 - 06:33:14 6451
Tonopah 06:18:51 -66.7 Dark Down 60.5 87.1 Up 06:03:51 - 06:33:51 6435
Bishop 06:18:56 -66.3 Dark Down 59.5 85.3 Up 06:03:56 - 06:33:56 6388
Beatty 06:18:51 -67.7 Dark Down 60.8 85.3 Up 06:03:51 - 06:33:51 6301
Lone Pine 06:18:56 -67.0 Dark Down 59.7 84.2 Up 06:03:56 - 06:33:56 6299
Indian Springs 06:18:49 -68.6 Dark Down 61.6 85.2 Up 06:03:49 - 06:33:49 6243
CPSLO 06:19:04 -65.7 Dark Down 57.5 81.0 Up 06:04:04 - 06:34:04 6223
Henderson 06:18:47 -69.3 Dark Down 62.1 84.5 Up 06:03:47 - 06:33:47 6171
Searchlight/Boulder City 06:18:47 -69.7 Dark Down 62.1 83.5 Up 06:03:47 - 06:33:47 6108
Patrick 06:18:44 -70.4 Dark Down 63.0 83.8 Up 06:03:44 - 06:33:44 6080
Laughlin/Bullhead City 06:18:47 -70.1 Dark Down 62.4 83.1 Up 06:03:47 - 06:33:47 6068
Kingman/Dolan Springs 06:18:45 -70.4 Dark Down 62.8 83.3 Up 06:03:45 - 06:33:45 6060
Wildwood 06:19:00 -67.8 Dark Down 59.0 79.8 Up 06:04:00 - 06:34:00 6043
Mohave Valley 06:18:47 -70.2 Dark Down 62.3 82.6 Up 06:03:47 - 06:33:47 6039
DCO 06:18:42 -71.1 Dark Down 63.5 83.5 Up 06:03:42 - 06:33:42 6033
Lake Havasu City 06:18:46 -70.6 Dark Down 62.5 81.9 Up 06:03:46 - 06:33:46 5991
Idyllwild 06:18:55 -69.3 Dark Down 60.4 79.7 Up 06:03:55 - 06:33:55 5961
Parker 06:18:47 -70.8 Dark Down 62.5 81.2 Up 06:03:47 - 06:33:47 5952
Blythe 06:18:48 -70.9 Dark Down 62.1 80.1 Up 06:03:48 - 06:33:48 5901
Calipatria 06:18:51 -70.5 Dark Down 61.3 79.0 Up 06:03:51 - 06:33:51 5868
Yuma 06:18:49 -71.3 Dark Down 61.9 78.4 Up 06:03:49 - 06:33:49 5802

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 78799, (2018/12/09 06:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 21.83 164
Alnath         05:26:17.5 +28:36:24  1.6 10.09 162
PPM 071196     06:05:34.0 +33:35:57  6.1  0.32 166
PPM 071191     06:05:24.0 +33:44:02  8.5  0.31 166
PPM 071226     06:06:41.3 +33:48:52 10.7  0.05 166
78799          06:06:51.2 +33:46:58 15.8       166
Positions are for J2000

Event circumstances last updated at 2017/08/03 16:26:55 UT

Marc W. Buie, Southwest Research Institute

RECON